GB2417112A - Reducing cpu and bus power when running in power-save modes - Google Patents

Reducing cpu and bus power when running in power-save modes Download PDF

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Publication number
GB2417112A
GB2417112A GB0521666A GB0521666A GB2417112A GB 2417112 A GB2417112 A GB 2417112A GB 0521666 A GB0521666 A GB 0521666A GB 0521666 A GB0521666 A GB 0521666A GB 2417112 A GB2417112 A GB 2417112A
Authority
GB
United Kingdom
Prior art keywords
power
bus
clock signal
lowest
running
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0521666A
Other versions
GB0521666D0 (en
GB2417112B (en
Inventor
Opher Kahn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Intel Corp
Original Assignee
Intel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intel Corp filed Critical Intel Corp
Publication of GB0521666D0 publication Critical patent/GB0521666D0/en
Publication of GB2417112A publication Critical patent/GB2417112A/en
Application granted granted Critical
Publication of GB2417112B publication Critical patent/GB2417112B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/324—Power saving characterised by the action undertaken by lowering clock frequency
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
    • G06F1/06—Clock generators producing several clock signals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Sources (AREA)
  • Microcomputers (AREA)

Abstract

A processing system includes a bus and a processor whose core is constrained to have one or more core clock signal frequencies no lower than a predetermined multiple of the lowest of one or more bus clock signal frequencies. In a power-save mode, the processor is able to generate one or more core clock signals at frequencies such that the lowest core clock signal frequency is lower than the predetermined multiple of the lowest of the one or more bus clock signal frequencies in performance mode. The processor is able to achieve this by generating the one or more bus clock signals so that the lowest of the bus clock signal frequencies in power-save mode is lower than the lowest of the bus clock signal frequencies in performance mode.

Description

GB 2417112 A continuation (72) Inventor(s): Opher Kahn (74) Agent and/or
Address for Service: R G C Jenkins & Co 26 Caxton Street, London, SW1H ORJ, United Kingdom
GB0521666A 2003-03-24 2004-02-18 Reducing cpu and bus power when running in power-save modes Expired - Fee Related GB2417112B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/394,256 US7290161B2 (en) 2003-03-24 2003-03-24 Reducing CPU and bus power when running in power-save modes
PCT/US2004/003352 WO2004095247A1 (en) 2003-03-24 2004-02-18 Reducing cpu and bus power when running in power-save modes

Publications (3)

Publication Number Publication Date
GB0521666D0 GB0521666D0 (en) 2005-11-30
GB2417112A true GB2417112A (en) 2006-02-15
GB2417112B GB2417112B (en) 2007-10-03

Family

ID=32988337

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0521666A Expired - Fee Related GB2417112B (en) 2003-03-24 2004-02-18 Reducing cpu and bus power when running in power-save modes

Country Status (9)

Country Link
US (2) US7290161B2 (en)
KR (1) KR100793521B1 (en)
CN (1) CN100437436C (en)
DE (1) DE112004000497B4 (en)
GB (1) GB2417112B (en)
HK (1) HK1090443A1 (en)
SG (1) SG116694A1 (en)
TW (1) TWI299118B (en)
WO (1) WO2004095247A1 (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7080271B2 (en) 2003-02-14 2006-07-18 Intel Corporation Non main CPU/OS based operational environment
EP1685507A4 (en) * 2003-10-31 2010-12-22 Ibm Method and apparatus for dynamic system-level frequency scaling
KR100716730B1 (en) * 2004-06-11 2007-05-14 삼성전자주식회사 Method for decreasing the power consumption in cpu idle-state and mobile device using the same
US20070101168A1 (en) * 2005-10-31 2007-05-03 Lee Atkinson Method and system of controlling data transfer speed and power consumption of a bus
US7539278B2 (en) * 2005-12-02 2009-05-26 Altera Corporation Programmable transceivers that are able to operate over wide frequency ranges
CN100377042C (en) * 2006-07-04 2008-03-26 浙江大学 Method for saving energy by optimizing running frequency through combination of static compiler and dynamic frequency modulation techniques
WO2008073597A1 (en) * 2006-12-14 2008-06-19 Intel Corporation Method and apparatus of power management of processor
JP4960813B2 (en) * 2007-09-14 2012-06-27 株式会社リコー Power control system
US8067861B2 (en) 2008-02-29 2011-11-29 Panasonic Corporation Interface device for host device, interface device for slave device, host device, slave device, communication system and interface voltage switching method
KR101740338B1 (en) * 2010-10-20 2017-05-26 삼성전자주식회사 Apparatus and method for adaptive frequency scaling in digital system
CN102611803A (en) * 2011-01-25 2012-07-25 深圳富泰宏精密工业有限公司 Cell phone power saving method and system
TWI486758B (en) * 2011-01-27 2015-06-01 Chi Mei Comm Systems Inc Power-saving method and system for mobile phone
CN103376874B (en) * 2012-04-24 2017-03-08 深圳市中兴微电子技术有限公司 A kind of multi-nuclear processor equipment and its method realizing clock control
GB2513529A (en) 2012-11-15 2014-11-05 Ibm System and method of low latency data tranfer between clock domains operated in various synchronization modes
US9195291B2 (en) 2013-06-21 2015-11-24 Apple Inc. Digital power estimator to control processor power consumption
US9304573B2 (en) 2013-06-21 2016-04-05 Apple Inc. Dynamic voltage and frequency management based on active processors
US9678556B2 (en) * 2014-02-10 2017-06-13 Qualcomm Incorporated Dynamic clock and voltage scaling with low-latency switching
CH709308A2 (en) * 2014-02-26 2015-08-28 Rieter Ag Maschf Electromotive driven feed cylinder for a nipper unit of a comber.
US9606605B2 (en) 2014-03-07 2017-03-28 Apple Inc. Dynamic voltage margin recovery
US20170289000A1 (en) * 2016-03-31 2017-10-05 Qualcomm Incorporated Systems and methods for controlling processing performance
US10635619B2 (en) * 2016-10-12 2020-04-28 Cirrus Logic, Inc. Encoding for multi-device synchronization of devices
CN110399034B (en) * 2019-07-04 2021-08-17 福州瑞芯微电子股份有限公司 Power consumption optimization method of SoC system and terminal
US10948957B1 (en) 2019-09-26 2021-03-16 Apple Inc. Adaptive on-chip digital power estimator
CN116931703B (en) * 2023-09-18 2023-12-26 惠州市鑫晖源科技有限公司 Electronic contest host power supply voltage adjusting method based on data analysis

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020073351A1 (en) * 2000-12-09 2002-06-13 Lg Electronics Inc. System and method for optimizing clock speed generation in a computer
US20020104029A1 (en) * 2001-01-02 2002-08-01 Windbond Electronics Corp. Method and device for adjusting executing efficiency
US20020116650A1 (en) * 2000-01-18 2002-08-22 Sameer Halepete Adaptive power control
US20030056132A1 (en) * 2001-09-19 2003-03-20 Alps Electric Co., Ltd. Computer arresting occurrence of unnecessary signals

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02280210A (en) * 1989-04-21 1990-11-16 Nec Corp Microcomputer
US5021679A (en) * 1989-06-30 1991-06-04 Poqet Computer Corporation Power supply and oscillator for a computer system providing automatic selection of supply voltage and frequency
US5153535A (en) * 1989-06-30 1992-10-06 Poget Computer Corporation Power supply and oscillator for a computer system providing automatic selection of supply voltage and frequency
GB9109301D0 (en) * 1991-04-30 1991-06-19 Motorola Israel Ltd Electronic equipment
GB2260631B (en) * 1991-10-17 1995-06-28 Intel Corp Microprocessor 2X core design
US5752011A (en) * 1994-06-20 1998-05-12 Thomas; C. Douglas Method and system for controlling a processor's clock frequency in accordance with the processor's temperature
ATE205616T1 (en) * 1994-10-19 2001-09-15 Advanced Micro Devices Inc INTEGRATED PROCESSOR SYSTEMS FOR PORTABLE INFORMATION DEVICES
US5734585A (en) * 1994-11-07 1998-03-31 Norand Corporation Method and apparatus for sequencing power delivery in mixed supply computer systems
US6209052B1 (en) * 1998-09-30 2001-03-27 Compaq Computer Corporation System and method for suppressing processor cycles to memory until after a peripheral device write cycle is acknowledged by the memory arbiter
US6311285B1 (en) * 1999-04-27 2001-10-30 Intel Corporation Method and apparatus for source synchronous transfers at frequencies including an odd fraction of a core frequency
US6567876B1 (en) * 1999-12-03 2003-05-20 Hewlett-Packard Development Company, L.P. Docking PCI to PCI bridge using IEEE 1394 link
US6785829B1 (en) * 2000-06-30 2004-08-31 Intel Corporation Multiple operating frequencies in a processor
US7007187B1 (en) * 2000-06-30 2006-02-28 Intel Corporation Method and apparatus for an integrated circuit having flexible-ratio frequency domain cross-overs
JP3495342B2 (en) * 2001-04-26 2004-02-09 Ｎｅｃマイクロシステム株式会社 Clock distribution circuit
DE10146712A1 (en) 2001-09-21 2003-04-10 Bayerische Motoren Werke Ag Parking aid device for motor vehicles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020116650A1 (en) * 2000-01-18 2002-08-22 Sameer Halepete Adaptive power control
US20020073351A1 (en) * 2000-12-09 2002-06-13 Lg Electronics Inc. System and method for optimizing clock speed generation in a computer
US20020104029A1 (en) * 2001-01-02 2002-08-01 Windbond Electronics Corp. Method and device for adjusting executing efficiency
US20030056132A1 (en) * 2001-09-19 2003-03-20 Alps Electric Co., Ltd. Computer arresting occurrence of unnecessary signals

Also Published As

Publication number Publication date
TW200424835A (en) 2004-11-16
US20040193934A1 (en) 2004-09-30
KR20050111617A (en) 2005-11-25
DE112004000497B4 (en) 2009-09-03
HK1090443A1 (en) 2006-12-22
TWI299118B (en) 2008-07-21
WO2004095247A1 (en) 2004-11-04
US7290161B2 (en) 2007-10-30
US20080034247A1 (en) 2008-02-07
CN1764887A (en) 2006-04-26
DE112004000497T5 (en) 2006-02-16
GB0521666D0 (en) 2005-11-30
CN100437436C (en) 2008-11-26
SG116694A1 (en) 2005-12-29
US7975161B2 (en) 2011-07-05
KR100793521B1 (en) 2008-01-14
GB2417112B (en) 2007-10-03

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20210218